package com.sky.controller.user;

import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping(("/user/dish"))
@Slf4j
@Api(tags = "菜品相关接口")
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> getDishesByCategoryId(@RequestParam Long categoryId){
        log.info("根据分类id查询菜品：{}", categoryId);

        //构造redis中的key，规则：dish_分类id
        String key = "dish_" + categoryId;

        //查询redis是否存在菜品数据
        if (redisTemplate.hasKey(key)){
            //如果存在，直接返回，无须查询数据库
            log.info("redis中存在该分类id为：{}的菜品数据",categoryId);
            List<DishVO> dishVOS = (List<DishVO>) redisTemplate.opsForValue().get(key);
            return Result.success(dishVOS);
        }

        //如果不存在，查询数据库，将查询到的数据放入redis中
        List<DishVO> dishVOS = dishService.listWithFlavors(categoryId);
        redisTemplate.opsForValue().set(key, dishVOS);
        return Result.success(dishVOS);
    }
}
